Ventilator.



G. A. L. DRAWS.

VENTILATOR.

APPLICATION FILED JAN- 13 19|?.

Patented Jan. 22, 1918.

3 SHEETS-SHEET 2.

G. A. L. DRAWS.

VENTILATOR.

APPLICATION FILED IAN. I3, I9I7.

Patented Jan. 22, 1918.

a 3. ETS-SHEET 3.

maarre.

v GEORGE A. L. DRAWS, F MILWAUKEE,-WISCONSIN.

VENTILATOR.

Application tiled January 18, 1917. Serial No. 142,164.

To all whom z't may concern:

Be it known that I, Gnomi-1A. L. DRAws, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Ventilators; and I do hereby declare that the following isa full, clear,'and exact description thereof.

My invention relates'to new and useful improvement'srin ventilators, more particu-4 larly of that type adapted to be positioned in a window or other opening for preventing a direct draft therethrough.

lt -iS in general the object of my invention to simplify the structure and improve the etiiciency of devices of this character,

and it is more particularly an object in this connection to provide a ventilator structure which may be assembled and disassembled in amost ready manner.

A. further object resides in the provision of a means whereby the inlet flow of air through the ventilator may be readily controlled.

y A still further important object resides in the provision of a ventilator of this nature includingan open end passa e way extending transversely of the win ow openving or other Ventilating aperture and so ar ranged as to prevent a'direct passage of air therethrough whereby lateral currents of air upon entering `said passage way will be defiected to insure a flow of air through the body of the ventilator.

A-still further object resides in the provision of a valve controlled air 'outlet passage associated with the main inlet passage of the ventilator.

` With the above and other objects and `advantages in view, the invention resides more particularly in the novel combination, formation and arranvfement of parts hereinafter described an pointed out in theappended claims. y

.In the drawings:

Figure 1 is a horizontal sectional view of a ventilator constructed in accordance with my invention,the plane of this view being indicated by the line 1 1 of Fig. 3. p

Fig. 2 is a vertical longitudinal sectional view through the transverse head portion of the' ventilatoras indicated by the .line 2 2 of Fig. 3. Fig. 3 isy avertical sectlonal view through the body of the ventilator on the line 3 3 of Fig. l'. r' Fig. 4 is a detail Sectional view ofthe shutter controlling means, on the line 4 4 of Fig. 5.

F1g..,5 is an elevational View of said shutter controllingmeans.

Referring now more particularly to the accompanylng drawings, `'the present embodlrnent of my ventilator comprises a substantlally tshaped casing, the body of which 1s adapted to. be positioned in a windon7 or other ventilation opening, and .which is open at the. ends of its head portlon and closed along the entire front cf 'said head portion whereby to prevent a direct .draft through the window. The head portion of this casing is formed by an outer castlng 5 including the front wall and top bottom and side wall sections which telescopically fit in corresponding wall sections of an inner casting 6, and are secured thereu to, as by the screws 7. Fromy points adja- The inner casting 6 includes a rear wall 9 which fits against the wall of the building, or other support and `this wall is provided w1tl1 an intermediately disposed aperture communicating with the"\body portion of the casing. At the sides of the aperture,'the wall 9 is inwardly offset to form curved de lecting surfaces 10 extending through substantially a quarter circle, and straight wall portions 11 extending at right angles to the body of the wall 9. Below the aperture of the wall 9, said wall is inclined rearwardly from its bottom edge and terminates at the aperture in a horizontal ortion 12. The body section ofthe venti atorcomprises a main casting including the side walls 13, the main bottom wall 14 and a horizontal partition wall` 15 disposed adjacent `the main bottom wall 14 and defining therewith an air outlet passage. For securing this main casting, to the inner casting 6 ofthe head section of the ventilator, the side walls 13 at their forward ends are inwardly oiiset to `ft within the aperture of the rear wall 9 and are secured, as by the screws 16.tothe portions 11 of the rear wall. -v'llhespan-g tition wall 15 is provided withv upwardly? offset forwardly extending lugs 17 similarly secured to the horizontal portion 12 of the rear Wall. The side walls 13 of the body section are preferably braced by vertical stif'lening ribs 18 cast integrally therewith on their inner faces, and it is noted that the width of these ribs is such that they lie outwardly of the side edges of the aperture of the rear Wall of the head ortion whereby said ribs do not interfere with the free flow of air through the body of the ventilator. Incidentally it may be noted that the horizontal portion 12 of the rear wall is braced by rib members 19 formed integrally with said horizontal portion and with the inclined lower portion of the wall. The body section of the ventilator is completedv by a top wall casting 20 secured to the upper edge portions of the side walls 13.

The entire ventilator casing thus described may be very readily assembled and disassembled, for its operative association with a window or other ventilator opening, whereby a free flow of air may be had through the ventilator opening without the inconveniences of a direct draft. It is noted that air may flow into the head section of the ventilator from either end thereof, and thence through the body section into the room. Should a relatively strong windbe blowing in a direction substantially parallel to the head section of the ventilator, passage of the wind therethrough without supplying a proper current of air to the body section of the ,ventilator is prevented by either of the` deflector surfaces 10, which deflect the current of air into the bulged portion of the front wall of the head section and thus set up an eddy whereby a current will be supplied through the body section of the ventilator, it being noted that said deflectorsurfaces and said-bulged portion of the front wall serve to define an offset of'the passage way of the head casing section.

To properly cleanse the air as it passes through the ventilator, a sheet of screen material 21 is disposed at the juncture of the casing section and rests at its edges against the shoulders formed by the said? offset of the side walls 13 and the securinglugs 16 of the partition 15,the upper edges of the screen resting -against a depending bracing rib 22 of lthe top casting. This screen sheet is held in place by eccentrically pivoted plates y,23 on the partition 15.-

Taking up now the means for controlling fiow of air through the ventilator, it is noted that the front and rear walls 9 of the head section casings are inwardly offset at their ends and secured to these inwardly offset end portions of the casing are the side bars 24 of a pair of rectangular frames which also include separable top bar sections 25' connected by bolts 26 passed through the laterally turned meeting ends thereof. Pivotally mounted in the inner portions of the side bars 24 which extend inwardly of the offsets of the walls vare the pintles of series of shutter plates 27 and each-of the shutter plates is provided at its inner edge with a ,laterally extending lug 28 which is pivoted to a common actuating bar 29 of the series of plates. Thus the shutter plates 27 are mounted in a most ready manner, and upon swinging their respective actuating bars 29 may be opened or closed to effectively control the passage of air through the ventilator, it being noted that the laterally turned ends of the transverse bar section of each end frame are extended in opposite directions whereby to permit -a complete closing of the shutter plates. For actuating the shutter plates from the inner end of the body section of the casing, links 30 are pivoted to the upper portions of the shutter actuating bars 29 and to the ends of the cross arm 31 fixed on a shaft 32 which is journaled in the lower portion of the rear Wall 9, and in a wall portion 33 integrally connecting the intermediate portions of the bottom 14 and partition 15, and incidentally strengthening said portions. Rotation of this shaft is controlled by a handle link 34 pivoted thereto, -and to secure the shaft in any desired position, said link is provided with a lug 35 selectively engageable in one of a series of notches in a rack segment 36 secured to the wall portion 33.

, Under certain severe conditions it may be possible for air to pass inwardly through the outlet passage of the ventilator, between the bottom 14 and partition 15, and to properly cleanse such possible inflow of air a pair of screen plates 37 are disposed in the'outlet passage and are secured in place by eccentrically pivoted plates 39 pressing said screen plates-against integral ribs projecting into the passage, the inner ends of the plates engaging in -grooves 40 formed in the ends of inturned extensions 41 of the central journal wall 33. Under some conditions it may be desired to entirely close the outlet passage, and to accomplish this doors`42 are pivoted at the sides of the wall 33, these doors being normally held in raised positions by pawls 43 pivoted on the side walls 13.

From the foregoing description-it Vwill be seen that 1 have provided an efficient and exceedingly simple ventilator structure, which may be most readily assembled and disassembled.

What is claimed is:

1. A ventilator comprising a T-shaped cas-` ing including a body portion and a head portion, said head portion being formed by two telescoping sections, the outersection thereof being bulged outwardly in a relatively wide V and the inner section having its wall broken for communication with the form air body portion, said wall being inwardly 0H set at the sides of its aperture to form curved deiectingsurfaces, and means in the head portion for controlling the entrance of.

air thereto.

2. A. ventilator comprising a l`shaped casing including a body portion anda head portion, the outer Wall of said 'head portion being bulged outwardly in a relatively wide V and the inner Wall being apertured for communication with the body portion, inwardly oiiset curved portions extending along the sides of said aperture to provide a communication with the atmosphere and to deiecting surfaces extending through substantially a quart-er circle in said head portion, a passage beneath said aperture and communicating with the atmosphere and with a passage in the body portion and the passage formed by said curved defiecting surfaces, and means in the head portion for controlling the entrance of air thereto.

3. A ventilator comprising a lshaped casing including a body portion and a head portion, said head portion being formed by tWo telescoping sections, the outer section being bulged outwardly in a relatively wide V and the inner section having .its `Wall apertured to communicate with the body portion, inwardly oiset and curveddeiecting surfaces in the wall of the inner section and at the sides of its aperture, said wall being inclined rearwardly from its bottom edge and terminating at the aperture and Wisconsin.

' GEGRGE A. L. DRAWS. 

